From lhernandez@illinois.edu Tue Dec 20 21:51:27 1994 Path: ashpoly!cascade!mxgate!coyoacan!illinois!lhernandez From: lhernandez@illinois.edu (Lucia Hernández) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Dec20.215127.4152@illinois.edu> Date: Tue, 20 Dec 1994 21:51:27 GMT Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). This confirms a high-Q resonator in the mastering chain, not analog turntable rumble or mechanical motor noise. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Lucia Hernández | lhernandez@illinois.edu PGP Key fingerprint: 0782 D1F9 B587 B797 "Keep the channels open." From jmuller@delphi.com Fri Dec 23 01:47:27 1994 Path: ashpoly!cascade!mxgate!coyoacan!delphi!jmuller From: jmuller@delphi.com (Jens Müller) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Dec23.014727.5947@delphi.com> Date: Fri, 23 Dec 1994 01:47:27 GMT References: <1994Dec20.215127.4152@illinois.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Dec20.215127.4152@illinois.edu>, lhernandez@illinois.edu (Lucia Hernández) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. Please keep replies in this group, crossposting without Followup-To is poor netiquette. -- Jens Müller -- Delphi Internet Services "Measuring a record you own is listening, not piracy." From lfournier@stanford.edu Sat Dec 24 22:23:27 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!lfournier From: lfournier@stanford.edu (Lucia Fournier) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Dec24.222327.1139@stanford.edu> Date: Sat, 24 Dec 1994 22:23:27 GMT References: <1994Dec20.215127.4152@illinois.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Dec20.215127.4152@illinois.edu>, lhernandez@illinois.edu (Lucia Hernández) writes: > I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. -- Lucia Fournier Tape trading list upon request. SASE required for international mail. From llaurent@kth.se Mon Dec 26 05:09:27 1994 Path: ashpoly!cascade!bigsur!kth!llaurent From: llaurent@kth.se (Lars Laurent) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Dec26.050927.9676@kth.se> Date: Mon, 26 Dec 1994 05:09:27 GMT References: <1994Dec20.215127.4152@illinois.edu> <1994Dec24.222327.1139@stanford.edu> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Dec24.222327.1139@stanford.edu>, lfournier@stanford.edu (Lucia Fournier) writes: > Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock. You're overlooking tape wow and flutter. A Revox B77 has at least 0.05% speed drift, which would smear a 14 Hz line across several bins. -- Lars Laurent "Hardware is temporary. The signal survives." Decstation 5000/200 / AmigaOS 3.1